I'd be surprised if they weren't. Many of them, like crazy dumb or stupid, are just too ingrained in the cultural lexicon. Retarded is a bit different, since that's a common and unfortunate affliction, but nobody is going to admit that they're afflicted with stupid and would prefer the term to not be used casually.
Stanford is about as influential an institution as we have. When tarball and gray hat are seen as racist there are no bounds.
The bold black aggressive lettering on a white background on that Stanford page is next. I am surprised no one noticed that actually.